Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Heidi Elizabeth Chatham, M.D

Family Medicine Physician in Buffalo Grove, IL · enumerated 2009 · practices at Northwest Community Heralth Services, Inc..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1659509834

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Registry record

Entity type Individual (Type 1)

Name Heidi Elizabeth Chatham

Credential M.D

Sex Female

Practice address 15 S Mchenry Rd, Buffalo Grove, IL, 60089

Phone (847) 618-0351

Fax (847) 618-0766

Enumeration date Jun 26, 2009

Last updated in NPPES Oct 5, 2021

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 57078 (WI) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 036128521 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Heidi Chatham?

The National Provider Identifier (NPI) for Heidi Chatham is 1659509834, a Type 1 (individual) record in the CMS NPPES registry.

Where does Heidi Chatham practice?

The practice location on file with NPPES is in Buffalo Grove, IL. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-05.